S
M
T
W
T
F
S
30
100°
74°
31
99°
77°
1
100°
83°
2
100°
79°
3
100°
78°
4
100°
76°
5
103°
77°
6
104°
73°
7
101°
76°
8
102°
79°
9
102°
76°
10
80°
68°
11
90°
65°
12
89°
71°
13
90°
68°
14
96°
75°
15
98°
79°
16
98°
74°
17
98°
76°
18
98°
76°
19
96°
75°
20
95°
68°
21
79°
61°
22
77°
56°
23
78°
53°
24
78°
57°
25
79°
62°
26
79°
59°
27
78°
55°
28
80°
56°
29
77°
55°
30
77°
51°
1
78°
50°
2
77°
51°
3
76°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lamar
Lamar's September 2026 forecast shows daily high temperatures ranging from 76° to 80°, with overnight lows between 50° and 62°. The average high for September is 78° with an average low of 56°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Lamar. See also: October | November | December.
